Quick timing question.

My car is in the shop currently, having the front end aligned. In the mean time, I want to have them check/set the timing. I saw in the "Gas Engine Tune Up Specs" sticky that for my engine (500 ci.), under "timing" it said 6B. If I tell the guys that I need the timing set to 6B, is that right? Will they understand what I am talking about? Is that what it NEEDS to be?